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Finding the Fourth Proportional to 30,666.96, 42,318.96 and 18,750.24

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Solution

The fourth proportional to 30,666.96, 42,318.96 and 18,750.24 is: 25,874.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,666.96 : 42,318.96 = 18,750.24 : x
  2. Step 2: Convert to fraction form
    30,666.96/42,318.96 = 18,750.24/x
  3. Step 3: Cross multiply
    30,666.96x = 42,318.96 × 18,750.24
  4. Step 4: Simplify right side
    30,666.96x = 793,490,656.55
  5. Step 5: Solve for x
    x = 793,490,656.55/30,666.96
  6. Step 6: Final answer
    x = 25,874.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.